Wireless Subframe Filling with Short Transmission Time Intervals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, the coexistence of R14 and R15 user equipment with different transmission time intervals can lead to inaccurate perception measurements and resource fragmentation due to the introduction of short Transmission Time Interval (sTTI), causing vehicles to mistakenly occupy communication resources and result in subframe filling inefficiencies.
Innovation Solution
The solution involves transmitting multiple transmission blocks with short TTIs within the same subframe, allowing for improved subframe filling and accurate perception measurements by ensuring that transmission blocks from different user equipment are combined and transmitted together, aligning with the structure of a traditional subframe, thereby addressing resource fragmentation and measurement inaccuracies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If sTTI transmission is used to reduce latency and improve responsiveness, then communication speed and reliability are improved, but resource fragmentation and perception measurement accuracy deteriorate
Solution Approach 1:
The subframe is segmented into multiple sTTI transmission blocks, where each sTTI occupies a portion of the subframe. By dividing the transmission resources into discrete sTTI blocks, the system achieves low-latency communication while enabling the R14 UE to perform perception measurements at subframe boundaries, thus resolving the measurement accuracy issue caused by continuous sTTI transmissions.
Solution Approach 2:
The R14 UE acts as an intermediary that performs perception measurements on subframes containing sTTI transmissions. By measuring at the subframe level rather than sTTI level, the R14 UE provides feedback that enables the R15 UE to adjust its transmission strategy, thereby improving overall system awareness and measurement accuracy despite the use of short TTIs.
2Loss of time
If sTTI transmission blocks are used to improve communication responsiveness, then latency is reduced, but subframe filling efficiency deteriorates
Solution Approach 1:
The system dynamically adjusts the number and positioning of sTTI transmission blocks within a subframe based on traffic conditions and measurement requirements. By making the transmission structure flexible rather than fixed, the system can optimize both latency performance and subframe utilization efficiency, filling subframes more effectively while maintaining low-latency communication.
3Adaptability or versatility
If R14 and R15 user equipment coexist with different TTI lengths, then system compatibility is improved, but resource allocation accuracy deteriorates
Solution Approach 1:
The system operates at two different time dimensions simultaneously: sTTI level for R15 UE communications and subframe level for R14 UE measurements. By allowing measurements and transmissions to occur at different time granularities, the system maintains compatibility between R14 and R15 equipment while enabling accurate resource allocation through subframe-level perception measurements that capture the overall resource usage pattern.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The present disclosure relates to an electronic device and a wireless communication method. An electronic device for wireless communication according to one embodiment comprises a processing circuit, wherein the processing circuit is configured to, when a user equipment carries out short-range service communication at a short transmission time interval smaller than a first transmission time interval, implement control so that at least two mutually independent transmission blocks, each having a short transmission time interval, are transmitted in the same subframe, wherein the length of the subframe is the same as the first transmission time interval.